Today is Earth Day. That means it's a time to show the world just how much we care about everything it's given us. It's also time to reflect on the fun we've had driving the least efficient cars we can find.

Even though there has been a push towards efficiency in vehicles over the last couple of decades, there are still some inefficient bastards.

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Like the Bugatti Veyron, which gets about -17 miles to the gallon. But what about over all time? What's the least efficient car that's ever been created?